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T-Radar Quick Start ​

Overview ​

T-Radar is a 60 GHz radar expansion module with no onboard host MCU. It attaches to a compatible LILYGO mainboard via pin headers and is driven by the host's firmware over I²C or SPI.

Hardware Connection ​

  1. Plug T-Radar onto a compatible LILYGO mainboard (e.g., T3, T-Beam) via the pin header
  2. Ensure the mainboard provides 3.3 V or 5 V power to the module
  3. Select I²C or SPI communication via the jumper on the board

Software Setup ​

  1. Download the A121 SDK / driver library from developer.acconeer.com
  2. Install the library into your Arduino or PlatformIO project
  3. Initialize the radar interface in your host firmware:
    cpp
    // Example I²C initialization (pseudo-code)
radar.begin(Wire);
radar.setMode(RADAR_MODE_DISTANCE);
  4. Read distance/motion data in your main loop

Notes ​

  • No host MCU: T-Radar has no microcontroller of its own — all code runs on the host mainboard
  • 60 GHz PCR: A121 Pulsed Coherent Radar, up to 20 m range
  • Accuracy: Millimeter absolute / micrometer relative accuracy
  • Use cases: Distance measurement, motion detection, material classification, vital sign monitoring (breathing, heart rate)
  • Penetration: Can detect through thin non-metallic materials; metal blocks the signal completely

FAQ ​

Q: Can T-Radar be used outdoors? A: Yes. 60 GHz radar is largely unaffected by weather, though heavy rain or snow may cause slight signal attenuation.

Q: Does it support multi-target detection? A: The current version targets single-object high-precision ranging. Multi-target discrimination requires additional algorithm work on the host.

Q: What is the maximum data refresh rate? A: Depends on the host MCU and interface speed; typically supports updates above 100 Hz.